Three Iraqis arrested in Switzerland in March are suspected of having planned an attack in the name of the Islamic State group, Swiss media reported Wednesday.

The daily newspaper Tages Anzeiger reported that Switzerland's Federal Intelligence Service had been tipped off by a western counterpart which intercepted the men's phone calls.

Switzerland on Wednesday added 11 names and five banks to its blacklist over the Ukraine crisis in fresh moves to stop the country from being used to avoid EU sanctions against Russia.

The government in a statement said it had taken "all the measures required to ensure that the most recent sanctions imposed by the European Union cannot be circumvented via Swiss territory".

A collision between two light aircraft in Switzerland on Sunday has left six people with serious injuries, according to police. 

One of the planes crashed in a field in the canton of St Gallen. Local police cited by Swiss news agency ATS said the four people on board were seriously injured in the accident.

One person was killed Friday in a shooting in the prayer hall of a Swiss mosque, police said.

The suspected killer was arrested at the scene in the northeastern city of St. Gallen, local police told Agence France Presse, without giving further details about the individual.

A landslide derailed a passenger train in the Swiss mountains on Wednesday sending one carriage plunging into a ravine, but it appeared that miraculously there had been no deaths.

Police said five people were seriously injured and six slightly hurt in the accident on the line between the upscale mountain resort of St. Moritz and the eastern city of Chur.

Three people were killed and several were injured when a train collided with a delivery van in Switzerland, local media reported Monday.

The Swiss news agency ATS quoted police as saying the accident occurred at a level crossing in Wolfenschiessen, in the canton of Nidwalden in central Switzerland.

The Swiss foreign ministry said Wednesday it is in talks about holding an international conference sought by Palestinian President Mahmoud Abbas focusing on protecting civilians in Gaza.

"Switzerland has begun consultations with state parties to the Geneva Conventions, following an official Palestinian request that a conference be held by the end of the year," said a ministry statement.

More than 200 songwriters have entered a contest to change Switzerland's national anthem, organizers who want to bin the less than rousing current version said on Monday.

Lukas Niederberger, director of the Swiss Society for Public Good, said that 215 entries had submitted to replace "The Swiss Psalm", which critics liken to a weather forecast crossed with a religious hymn, given its repeated references to God and Alpine vistas.

U.S. tax evaders will find it much harder to hide money abroad starting Tuesday, when a sweeping new law enters into effect requiring foreign banks to report their offshore accounts.

Banking centers like Switzerland and Luxembourg that agreed to the U.S. Foreign Account Tax Compliance Act (FATCA) will have to begin turning over account names and other data to U.S. financial authorities so that they can tax unreported income.

Haris Seferovic scored in the last minute of injury time to grab Switzerland a dramatic 2-1 win over Ecuador in their Group E game at the World Cup finals in Brasilia on Sunday.

Seferovic's winner capped a remarkable comeback by the top seeds in the group as fellow substitute Admer Mehmidi had taken just 121 seconds to make his mark as he leveled the game in the 48th minute.